642431310506733 has 32 divisors (see below), whose sum is σ = 969078446121600. Its totient is φ = 374988895232000.

The previous prime is 642431310506731. The next prime is 642431310506737. The reversal of 642431310506733 is 337605013134246.

It is a cyclic number.

It is not a de Polignac number, because 642431310506733 - 2¹ = 642431310506731 is a prime.

It is a super-3 number, since 3×642431310506733³ (a number of 45 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642431310506731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 836645028 + ... + 837412541.

It is an arithmetic number, because the mean of its divisors is an integer number (30283701441300).

Almost surely, 2^{642431310506733} is an apocalyptic number.

It is an amenable number.

642431310506733 is a deficient number, since it is larger than the sum of its proper divisors (326647135614867).

642431310506733 is a wasteful number, since it uses less digits than its factorization.

642431310506733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674058013.

The product of its (nonzero) digits is 3265920, while the sum is 48.

The spelling of 642431310506733 in words is "six hundred forty-two trillion, four hundred thirty-one billion, three hundred ten million, five hundred six thousand, seven hundred thirty-three".